I am a renter in a home and there seems to be a leakage in the floor. The did something with the toilet, yet the floor is still wet. (you don't really notice it until you lay a towel or rug over the floor) The rugs and towels become soaked and never dry up. What do you suppose is the cause. Will it be an easy fix or an expensive one? In addition, the wetness seems to get onto the carpet outside of the bathroom, although it's a little dry now, i don't know if it'll return.